gurgle1624 said:

I thought it would lend more credibility to the scene if we actually saw or at least heard why it wasn't friendly. I mean if someone introduced you to someone on the phone and then said I dont think he's very nice but gave no reason for not being nice wouldnt you be curious as to why that person isnt nice?

Watch that scene again and think how cool it would be to at least hear laser blasts, yells, static, then "it isnt friendly whatever it is".

I think it's perfectly logical as is. They're hiding from the Empire, and their lives may well depend on staying hidden, therefore any signs of technology or life on Hoth must be assumed a threat and treated as such until proven otherwise.

It's more like if your ex-girlfriend is chasing you with an axe, and you run to a friend's house to hide out for a while. Suddenly your friend comes into the room saying "hey, some chick called asking for you" and he hands you the phone. Your first reaction would likely be to think she's not friendly, whoever she is. (hopefully that makes sense and I'm not just crazy)